摘要(英) |
The study is on the spiral polishing of the inner wall of bores through abrasive flow by means of the grinding materials of silicon carbide and magnetic hot melt particles, propelled by a spiral spindle and a circular neodymiμm magnet around the work piece. The neodymiμm magnet functioned as driving the magnetic hot melt particles and forcing the silicon carbide to polish the inner surface of bores. In the experiment, the factors investigated included the effects upon working temperature, abrasive viscosity, surface roughness, material removal by controlling magnetic flux density, size of silicon carbide particles, weight of silicon carbide particles, weight of magnetic hot melt particles, silicone oil viscosity, spindle rotation speed, machining time, and machining gap. In addition, sets of polishing parameters on the polished surface were examined to find the best parameter setting.
The result of the experiment suggested that with the increase of machining time, the liquidity of abrasive rose, and a more ideal polishing effect could be achieved. Based on the results, the best polishing effect might be obtained through the use of a 90mT neodymiμm magnet, 22μm SiC particles, 120 grams of SiC particles, 2000mm2/s viscosity of silicone oil, 4000rpm rotation speed, and a 6mm-machining gap. The surface roughness was effectively improved from Ra 0.9μm to Ra 0.094μm.
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參考文獻 |
[1]R. S. Walia, H. S. Shan, P. Kμmar, “Abrasive flow machining with additional centrifugal force applied to the media.”, Machining Science and Technology, Vol 10, pp.341-354, July-September 2006.
[2]Mamilla Ravi Sankar, S. Mondal, J.Ramkμmar, V. K. Jain, “Experimental investigations and modeling of drill bit-guided abrasive flow finishing (DBG-AFF) process”, International Journal of Advanced Manufacturing Technology, Vol 42, pp.678-688, July 2008.
[3]Kamal K. Kar, N.L. Ravikμmar, Piyushkμmar B. Tailon, J. Ramkμmar and D. Sathiyamoorthy, “Performance evaluation and rheological characterization of newly developed butyl rubber based media for abrasive flow machining process”, Journal of Materials Processing Technology, Vol 209, pp.2212-2221, February 2009.
[4]K. Hanada, H. Yamaguchi, H. Zhou, “New spherical magnetic abrasives with carried diamond particles for internal finishing of capillary tubes”, Diamond and Related Materials, Vol 17, pp.1434-1437, July-October 2008.
[5]M. Ravi Sankar, V.K. Jain , J. Ramkμmar, “Rotational abrasive flow finishing (R-AFF) process and its effects on finished surface topography”, International Journal of Machine Tools and Manufacture, Vol 50, pp.637-650, July 2010
[6]Mamilla Ravi Sankar, V.K. Jain, J. Ramkμmar, “Experimental investigations into rotating workpiece abrasive flow finishing”, Wear, Vol 267, pp.43-51, June 2009.
[7]Sunil Jha and V. K. Jain, “Design and development of the magnetorheological abrasive flow finishing (MRAFF) process”, International Journal of Machine Tools and Manufacture, Vol 44, pp.1019-1029, August 2004.
[8]Sehijpal Singh, H.S. Shan, “Development of magneto abrasive flow machining process”, International Journal of Machine Tools & Manufacture, Vol 42, pp.953-959, June 2002.
[9]Amit M. Wani, Vinod Yadava, Atul Khatri, “Simulation for the prediction of surface roughness in magnetic abrasive flow finishing (MAFF)”, Journal of Materials Processing Technology, Vol 190, pp.282-290, July 2007.
[10]電機工程手冊編輯委員會,機械工程手冊2-鋼材料,五南出版社,台北, 2009。
[11]G.Taguchi, Introduction to Quality Engineering: Designing quality into Products and Processes, Asian productivity organization, Tokyo, 1990.
[12]Douglas C. Montgomery, Design and Analysis of Experiments, Wiley, Singapore, 1990.
[13]R.A. Fisher, Statistical Methods for Research Workers, Olive and Boyd, London, 1925.
[14]P. J. Ross, Taguchi Techniques for Quality Engineering, McGraw Hill, New York, 1992.
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